Air pump



Jan 4.9

H; J. WEPPLQ AIR PUMP Filed Sept. a. 1924 [NVE/@Tan RY' l 05' WEPPLo y 4, WNHMK' e 'ci Patented Jan. 4, 1927.

entre stares rari" 1 r: we :tiene HENRY J'. WEEILO, OF MINNEAPOLIS, MINNESOTA.

Applicatipn filed September 'lhis invention relates to in'iprovements in air pumps and more lnirticularly to such pumps o' the hand-operated reciprocating` type such as are cmnmonly employed 1n connection with automobiles to intl-ate the usual pneumatic tires thcreo'l.

'ihe particular object of thisI invention is to provide a manua.ily-operated reciprocat ingr air pump having` means thereon whereby the operator may employ foot-power to dmvnuuu'dly torce the reciprocatingr piston lhereolE lo pump air into a tire or other device. l

A ilurther and more specific object ol.l the invention is to provide such a pump having' a toot pedal and hand rip reciprocally mounted thereon and operatively connected to the pump rod thereof, so that the downward or power stroke of the iston may be effected by foot pressure an the suction stroke accomplished by hand pow-er, thereby `greatly increasing' the efficiency of' the pump.

A further object. of the invention is to provide a combined hand and foot pumpoperating mechanism particularly adaptable for use in conjunction with reciprocating pumps. and which mechanism may also be used as an attachment to convert an ordinary hand-operated pump into a foot-operated pump`r the necessary changes required to make such a conversion being` practically minimized.

A further object oi' the invention is to provide such a device of simple and inexpensive construction which comprises very few parts and may therefore be manufactured at a minimum cost.

Other objects of the invention will appear from the` following description and the accompanying drawings and will be pointed out in the annexed claims.

In the accompanying drawings forming a part of this specification,

Figure 1 is a view in side elevation ot a reciprocating` pump showingmy invention applied thereto;

Figure 2 is a sectional plan on the line 2 2 of Figure 1; and

Figure 3 is a detail sectional view on the line 3-3 of F igure 1.

In the selected embodiment oil the invention here shown there is illustrated a reciprocating air pump of ordinary construction. comprising a cylindrical tube or cylinder 5 having,` a pump rod 6 reciprocally mounted 8, 1924. Serial No. 736,625.

therein. The usual leather cup or piston 7 suitably secured to the lower end ol the l rod 6 as shown in Figure l` and a head t3 is secured to the upper end ot the cylinder (l to torni a closure therelor and also a gruide 'tor the rod (l. The cylinder is preferably mounted in a base t) having;` an outwardly cxcndinp end portion ll prorided thereon to lorm a support tor the pump when in operation. A pivotally mounted supportingi` menu ber preferably constructed ot heavy wire or rod and U-shaped in form, is provided on the opposite side ot the cylinder. rl`he terminals 13 ot this supporting member arc preferably inwardly bent and fitted into opposed soc provioed in a huh 'I fl. as shown :in F iggure 2. so that the member may be upwardly folded against the side ot' the cylinder as indicated in dotted lines in Fi ure 1, when the pump is not in use. Vilhcn the supporting member 12 is extended as shown in full lines1 Figure 1 it provides a step -for the operator to place his toot upon to support the pump when beine' operated.

A feature of this invention resides in the novel means provided tor reciprocally actuating;` the pump rod 6 when pumpinp; air into a tire or other device. Such means preferably consists in the provision ot an auxiliary rod 15 having its upper central portion connected to the upper end ot the pump rod 6 by ineansof a U-shaped clip or clevis 16 which-is suitablv secured to thil rod by such means as welding. As shown in Figure 3, a pin 17 connects the clevis 16 to the pump rod G. The lower portion ot the rod 15 has a loop 18 secured thereto which is vadapted to encircle the cylinder 5 and thereby provide a guide for the lower end ot the rod. in outwardly extendingy step 19 having its outer end 21 preferably upwardly bent as shown` is provided ou the lower end of the rod 15 and functioifie` as a step or pedal for the operator to place his foot upon to downwardly torce the pump rod 6 in the operation of the pump. A hand grip 22 is provided at the upper end ot' the rod 15 so that the operator may grasp the rod to upwardly lift it to raise the piston 7' during the suction stroke ot the pump. The usual hose connection 23, having a coupling 24 for connection with a tire or other device is connected to the base 9 and communicates with the interior of the piston. v In the operation of this novel pump it leo A pump will he positioned as shown in Figure 1, with the U-sha-ped supporting member 12 ex tended so that the operator may place one foot thereupon. The operator will then grasp the hand-grip 22 of the auxiliary rod and` lift it, and therefore the pump rod 6 and piston 7, until the step 19 will be substantially in the position shown in dotted lilies, Figure 1. le will then place 1 his other foot upon the step 19 and downwardly force it to the position shown in full lines, thereby forcing the air, drawn into the pump by the suction stroke, through the hose connection 23 and into the tire or other device being inated. rlhus, it will be seen that the suction stroke of the pump will be performed by hand power, that is, the rod and piston will be lifted by hand to draw airV into the pump cylinder, and the air thus drawn into the cylinder will be expelled therefrom by downward pressure of the operators foot upon the step 19. Also, if desired, the operator may bear down upon the hand-grip 22 when downwardly forcing the piston by means of the step 19, thereby increasing the power applied to the pump rod. By the provision of the step 19 in conjunction with a reciprocating air pump the efficiency of such a will be considerably increased as a result of the operator being able to apply greater power or force to the downward or pressure stroke of the piston A pump provided with such a step may therefore be operated with less effort and with greater convenience than the ordinary type of handoperated pump such as are now in common use.

The combined hand and foot pump-operating mechanism here shown may also be used as an ordinary hand pump if desired by simply reciprocating the rod 15 and therefore the pump rod 16 by means of the hand-grip 22. It may also be used as an attachment for reciprocating pumps of ordinary construction by simply removing the usual hand-grip provided on such a pump and securing the clip 16 to the upper end thereof and fitting the loop 1S to the cylinder thereof in the manner shown in the accompanying drawing.

In the construction of this novel pump Vthe cylinder is preferably arranged at a slight angle in the base 9 so that when pressure 1s applied to the rod 15 at the side of the pump, the pump will be more stable in operation. By thus arranging the cylinder in the base 9 there will also be less danger of the operators knee striking the upper portieri of the pump when operating it.

In the drawings there has been disclosed a. structure designed to carry out the various objects of the invention but it is to be understood that the invention is not conlined to the exact features shown as various changes may be made within the scope of the claims which follow.

I claim as my invention:

1. The combination with a base, a pump barrel mounted thereon and having a plunger, and an attachment for operating the plunger, comprising a rod having an integral loop at its lower end mounted to slide von said barrel, and having step and hand grip portions respectively at the bottom and top and extending in the same direction, said rod connected at an intermediate point to the plunger by an arm extending in a direction opposite to the step and hand portions.

2. The combination with a pump barrel and plunger therefor, and a rod within said barrel attached to said plunger, of a rod outside said barrel having a loop to encircle and slide on said barrel, and a clip for attachment to said plunger rod, the lower end of the rod outside said barrel having a sliep thereon forming a foot-piece to allow the user of the pump to apply the foot thereto and aid in depressing the plunger in said barrel, the upper end of the rod outside said barrel having a. hand-grip and normally projecting above said barrel.

3. The combination with a pump barrel and plunger therefor and a rod within said barrel attached to said plunger, of an oper ating rod formed independently of said pump rod and mounted to slide on `the walls of said pump barrel and adjacent thereto, the lower end of said operating rod having an angularly formed step thereon to receive the foot of the operator, the upper end of said operating rotl: projecting above said arrcl and having a hand grip withi-n convenient reach of the operator, said operating rod below said hand grip being adjacent to the upper end of said plunger rod and having means for connection therewith to insure simultaneous uniform movement of said rods, downward pressure of the hand and foot of the operator on said operating rod being transmitted directly to said plunger rod.

In witness whereof, I have hereunto set my hand this 5th day of September 1924.

HENRY J. VVEPPLO. 

